IntelSiliconPkg/Feature/Capsule/Library/MicrocodeFlashAccessLibNull/MicrocodeFlashAccessLibNull.c

   1 /** @file
   2   Microcode flash device access library NULL instance.
   3
   4   Copyright (c) 2016, Intel Corporation. All rights reserved.<BR>
   5   This program and the accompanying materials
   6   are licensed and made available under the terms and conditions of the BSD License
   7   which accompanies this distribution.  The full text of the license may be found at
   8   http://opensource.org/licenses/bsd-license.php
   9
  10   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  11   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  12
  13 **/
  14
  15 #include <PiDxe.h>
  16
  17 #include <Library/BaseMemoryLib.h>
  18 #include <Library/MicrocodeFlashAccessLib.h>
  19
  20 /**
  21   Perform microcode write opreation.
  22
  23   @param[in] FlashAddress      The address of flash device to be accessed.
  24   @param[in] Buffer            The pointer to the data buffer.
  25   @param[in] Length            The length of data buffer in bytes.
  26
  27   @retval EFI_SUCCESS           The operation returns successfully.
  28   @retval EFI_WRITE_PROTECTED   The flash device is read only.
  29   @retval EFI_UNSUPPORTED       The flash device access is unsupported.
  30   @retval EFI_INVALID_PARAMETER The input parameter is not valid.
  31 **/
  32 EFI_STATUS
  33 EFIAPI
  34 MicrocodeFlashWrite (
  35   IN EFI_PHYSICAL_ADDRESS         FlashAddress,
  36   IN VOID                         *Buffer,
  37   IN UINTN                        Length
  38   )
  39 {
  40   CopyMem((VOID *)(UINTN)(FlashAddress), Buffer, Length);
  41   return EFI_SUCCESS;
  42 }